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annotate dep/animia/src/util/osx.cc @ 194:8548dc425697

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sys/osx: remove all objective-c++ stuff mmmm :)
author Paper <mrpapersonic@gmail.com>
date Thu, 07 Dec 2023 03:17:05 -0500
parents 2d5823df870f
children a7d0d543b334
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1 #include "animia/util/osx.h"
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3 #include <string>
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4 #include <memory>
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5
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6 #include <sys/sysctl.h>
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7 #include <libproc.h>
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9 namespace animia::internal::osx::util {
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11 #ifdef HAVE_COREFOUNDATION
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12 /* all of these LaunchServices things use *internal functions* that are subject
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13 * to change. Granted, it's not very likely that these will change very much
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14 * because I'm fairly sure Apple uses them lots in their own internal code.
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15 */
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16 typedef CFTypeRef (*LSASNCreateWithPidSpec)(CFAllocatorRef, pid_t);
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17 typedef CFDictionaryRef (*LSCopyApplicationInformationSpec)(int, CFTypeRef, CFArrayRef);
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18
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19 static LSCopyApplicationInformationSpec LSCopyApplicationInformation = nullptr;
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20 static LSASNCreateWithPidSpec LSASNCreateWithPid = nullptr;
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22 /* retrieved from LaunchServicesSPI.h in WebKit */
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23 static constexpr int kLSDefaultSessionID = -2;
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25 static const CFStringRef kLaunchServicesBundleID = CFSTR("com.apple.LaunchServices");
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27 /* retrieved dynamically */
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28 static CFStringRef kLSDisplayNameKey = nullptr;
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29 static CFStringRef kLSPIDKey = nullptr;
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31 static bool GetLaunchServicesPrivateSymbols() {
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32 CFBundleRef launch_services_bundle = CFBundleGetBundleWithIdentifier(kLaunchServicesBundleID);
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33 if (!launch_services_bundle)
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34 return false;
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36 LSCopyApplicationInformation = (LSCopyApplicationInformationSpec)CFBundleGetFunctionPointerForName(launch_services_bundle, CFSTR("_LSCopyApplicationInformation"));
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37 if (!LSCopyApplicationInformation)
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38 return false;
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39
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40 LSASNCreateWithPid = (LSASNCreateWithPidSpec)CFBundleGetFunctionPointerForName(launch_services_bundle, CFSTR("_LSASNCreateWithPid"));
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41 if (!LSASNCreateWithPid)
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42 return false;
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43
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44 kLSDisplayNameKey = *(CFStringRef*)CFBundleGetDataPointerForName(launch_services_bundle, CFSTR("_kLSDisplayNameKey"));
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45 if (!kLSDisplayNameKey)
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46 return false;
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47
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48 kLSPIDKey = *(CFStringRef*)CFBundleGetDataPointerForName(launch_services_bundle, CFSTR("_kLSPIDKey"));
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49 if (!kLSPIDKey)
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50 return false;
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51
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52 return true;
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53 }
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55 static bool LaunchServicesGetProcessName(pid_t pid, std::string& result) {
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56 if (!LSCopyApplicationInformation || !LSASNCreateWithPid)
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57 if (!GetLaunchServicesPrivateSymbols())
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58 return false;
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60 CFTypeRef asn = LSASNCreateWithPid(kCFAllocatorDefault, pid);
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61 if (!asn)
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62 return false;
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64 CFArrayRef request_array = CFArrayCreate(NULL, (const void **)kLSDisplayNameKey, 1, NULL);
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65 if (!request_array) {
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66 CFRelease(asn);
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67 return false;
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68 }
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69
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70 CFDictionaryRef dictionary = LSCopyApplicationInformation(kLSDefaultSessionID, asn, request_array);
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71
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72 CFRelease(request_array);
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73 CFRelease(asn);
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74
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75 if (!dictionary)
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76 return false;
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78 {
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79 CFStringRef rstr;
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81 if (!CFDictionaryGetValueIfPresent(dictionary, kLSDisplayNameKey, (CFTypeRef*)&rstr) || !rstr)
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82 return false;
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83
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84 if (!StringFromCFString(rstr, result)) {
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85 CFRelease(rstr);
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86 return false;
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87 }
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88
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89 CFRelease(rstr);
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90 }
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91
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92 result.resize(result.find('\0'));
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93
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94 return true;
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95 }
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96
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97 bool StringFromCFString(CFStringRef string, std::string& result) {
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98 if (!string)
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99 return false;
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100
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101 result.resize(CFStringGetMaximumSizeForEncoding(CFStringGetLength(string), kCFStringEncodingUTF8) + 1);
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102 if (!CFStringGetCString(string, &result.front(), result.length(), kCFStringEncodingUTF8))
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103 return false;
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104
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105 return true;
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106 }
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107 #endif // HAVE_COREFOUNDATION
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108
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109 static bool GetProcessArgs(pid_t pid, std::string& args) {
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110 /* sysctl shouldn't touch these, so we define them as const */
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111 const int mib[3] = {CTL_KERN, KERN_PROCARGS2, static_cast<int>(pid)};
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112 const size_t mib_size = sizeof(mib)/sizeof(*mib);
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113
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114 /* Get the initial size of the array
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115 *
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116 * NOTE: it IS possible for this value to change inbetween calls to sysctl().
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117 * Unfortunately, I couldn't care less about handling this. :)
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118 */
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119 size_t size;
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120 {
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121 int ret = sysctl((int*)mib, mib_size, nullptr, &size, nullptr, 0);
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122 if (ret)
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123 return false;
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124 }
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125
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126 /* Reserve the space for it in args */
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127 args.resize(size);
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128
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129 /* Get the contents of argc and argv */
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130 {
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131 int ret = sysctl((int*)mib, mib_size, &args.front(), &size, NULL, 0);
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132 if (ret)
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133 return false;
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134 }
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135
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136 /* Is the size big enough to hold at least argc? */
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137 if (size < sizeof(int))
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138 return false;
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139
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140 args.resize(size);
190
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141 return true;
163
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142 }
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143
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144 static bool GetProcessNameFromArgs(pid_t pid, std::string& result) {
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145 if (!GetProcessArgs(pid, result))
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146 return false;
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147
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148 /* Get argc using memcpy */
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149 int argc;
190
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150 memcpy(&result, &result.front(), sizeof(argc));
163
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151
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152 /* Do we even have argv[0]? */
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153 if (argc < 1)
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154 return false;
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155
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156 /* Find the first null character */
190
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157 size_t null_pos = result.find('\0', sizeof(argc));
163
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158 if (null_pos == std::string::npos)
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159 return false;
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160
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161 /* Find the last slash */
190
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162 size_t last_slash = result.rfind('/', null_pos);
163
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163 if (last_slash == std::string::npos)
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164 return false;
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165
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166 /* Return our result */
190
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167 result = result.substr(last_slash + 1, null_pos - last_slash - 1);
163
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168 return true;
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169 }
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170
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171 static bool GetProcessNameFromKernel(pid_t pid, std::string& result) {
165
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172 result.resize(2 * MAXCOMLEN);
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173
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174 int size = proc_name(pid, &result.front(), result.length());
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175 if (!size)
163
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176 return false;
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177
165
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178 result.resize(size);
163
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179 return true;
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180 }
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181
190
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182 bool GetProcessName(pid_t pid, std::string& result) {
163
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183 #ifdef HAVE_COREFOUNDATION
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184 if (LaunchServicesGetProcessName(pid, result))
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185 return true;
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186 #endif // HAVE_COREFOUNDATION
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187
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188 /* Try parsing the arguments, this prevents the process name being
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189 cut off to 2*MAXCOMLEN (32 chars) */
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190 if (GetProcessNameFromArgs(pid, result))
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191 return true;
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192
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193 /* Then attempt getting it from the kernel, which results in the
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194 process name being cut to 32 chars (worse, 16 chars if p_name is
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195 unavailable) */
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196 if (GetProcessNameFromKernel(pid, result))
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197 return true;
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198
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199 return false;
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diff changeset
200 }
162
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parents:
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201
61b76c7b656a dep/animia: add os x launchservices method
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parents:
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202 }